Measuring instrument.



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J. J. JONES.

MEASURING INSTRUMENT.

APPLICATION FILED MAY 11, 1908.

91 1,729. Patented Feb. 9, 1909.

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4 I A MW -J. J. JONES.

MEASURING INSTRUMENT; APPLICATION FILED MAY 11, 1908.

911,729. Patented Feb. 9, 1909.

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' nNinD STATE S PATENT JOHN .T. JONES,-OF MOUNT VERNON, KENTUCKY,ASSIGNOR TO EDWARDJONES, OF VAIL,

' ARIZONA TLRRITORY.

MEASURING INSTRUMENT.

Specificationof Letters Patent.

Patented Feb. 9, 1909.

Application filed May 11, 1908. Serial No. 432,169.

To all whom it may concern:

Be it known that 1, JOHN J. JONES, a citizen of the United States,residing at. Mount Vernon, in the county of Rookcastle and State ofKentucky, have invented certain new and useful Improvements in MeasuringInstruments, of which the following is a specification.

This invention relates to measuring instruments and especially refers toa device for measuring logs.

An object of this invention is to enable the measurement and approximatedetermination of the amount of valuable lumber in atree before felling.7

Another object of the invention is to provide a device that can beoperated and ap plied by hand and also'may be applied to the upperportion of a tree by a person standing upon the ground.

A further object of the lnvention isthe provision of certain meansbywhich the device may be applied to trees of various diameters so as torender the instrument applicable to all cases.

Other objects and advantages will be apparent from the followingdescription and it will be understood that changes in the specificstructure shown and described may be made within the scope of the claimswithout departing from the spirit of the invention.

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figure 1 is a rear elevation of the device as applied to a tree, Fig. 2is a top plan view of the same, Fig. 3 is a front elevation of thedevice, Fig. 4 is an end elevation of the instrument, Fig. 5 is a topplan view of the device havingthe tree engaging arms reversed so as toapply to a tree of large diameter, Fig. 6 shows a fragmentary view oftwo sections of the handle and the method of joining the same, Fig. 7 isfragmentary view of the scale employed.

Referring to the drawings, 10 designates a head having a sleeve portion11 diagonally disposed upon the back face thereof for the reception of ahandle 12. The handle 12 comprises sections 13, 14 etc., there being asmany sections employed as is required in accordance with the height ofthe tree 15. The sections 13 and 14 are provided with enlarged lowerends 16which are adapted to contain the upper ends of the adjoiningsections 14 when the handle is to be lengthened. The sections 13 and 14are preferably about six feet in length so that the length of the treemaybe roughly calculated by the operator. The head 10 supports twolongitudinally disposed rods 16 and 17 which are arranged in paralleland which are joined at their outer extremities by the cross rods 18 and19. The entire length of the device is about five feet from the rod 18to the rod 19. Slidably disposed upon the rods are two pairs of spacedblocks 20 and 21, each pair being spaced about one foot and held infixed relation to each other by cross members 22 and 23. The members 22and 23 are held yieldably at the outer ends of the rods 16 and 17 bysuitable springs 24 and 25 which are-supported between the rods '18 and19 and the inner blocks 20 and 21, the springs 24 and 25 beingpositioned on the back of the device. For the purpose of drawing themembers 22 and 23 towards the center, cords 26 are secured to the innerblocks 20 and 21 and are passedover pulleys 27 disposed upon the back ofthe head 10 and are then passed downwardly to the operator. Upon theouter faces of the sliding members 22 and 23 channels 28 are formed,into which are fitted the gage arms 29. The gage arms 29 comprise. ashank portion 30 which is adapted to be engaged in the channels 28 andsecured therein by set screws 31. The

gage arms 29 forwardly extend from the innerends of the shanks 30 forthe purpose of engaging the sides of the tree 15. The sliding member 22carries upon its outer face an arm 32 which is provided upon its undersurface with a scale 33 and which extends centrally from the member 22being engaged between suitable guides 34 disposed upon the. outer faceof the opposite sliding member 23. The guides 34 also indicate upon thescale 33 the distance the gage arms 29 are separated from one another.

A tree of great dimensions is measured by loosening the set screws 31and withdrawing the shanks 30 from the channels Y23 and inserting theshanks 30 oppositely in the channels 28 and then securing the same inthe channels 20 by the set screws 31. As the sliding members 22 and 23are each one foot long it will be necessary to add their lengths to thedistance marked upon the scale 33 to determine the diameter of the tree15.

In operation, the cord 26 is released and the device is placed againstthe tree 15 allowing the arms 29 to be disposed on opposite sides of thetree 15. The device is supported upon the handle 12 which can belengthened to any desired length by the addition of sections 13 and 14..The height of the tree 15 can be approximated by the length of thehandle as the sections are preferably six feet in length. I

, The dimensions set forth in this specification form no part of theinvention but simply illustrate that the device is to be of standarddimensions for the purpose of the ready calculation of the operator. A

When the device is raised to the required height the cord 26 is drawnand the sliding members 22 and 28 are moved centrally toward the head 10until the gage arms 29 engage the sides of the tree 15. During thesliding movement of the members 22 and 23 the arm 32 is also operatedsliding through the guides 34 and marking on the scale the distancebetween the arms 29. The scale 33 is so marked that it can easily beread from an observer at the foot of the tree 15. I v 7 As beforedescribed when a tree of large diameter is to be measured the arms 29are inserted in the channels 28 in the opposite direction thus disposingthe arms 29 at the outer ends of the sliding members 22 and 23 at adistance of two feet further apart. The

scale reading is taken and to it is added the extra two feet thusenabling the instrument to measure the diameter of trees equal to thetotal length of the rods 16 and 17. In the measurement, the thickness ofthe bark upon the tree 15 must be taken into consideration.

hat is claimed is 1. A device for measuring the diameter of trees,comprising a. head, rods supported upon said head, sliding memberscarried by said rods, means for actuating said sliding members alongsaid rods, arms disposed upon said members and a handle for engagingsaid head and adapted to support said device.

2. A measuring instrument comprising a head, rods on said head, slidingmembers on said rods, springsior tensionally holding said membersoutwardly upon said rods, cords to actuate said members at times againstthe tension of said springs, detachable arms carried by said members, ascale carried by said members, adapted to denote the distances betweensaid arms, and a sectional handle adapted to support said head.

In testimony whereof I allix my signature, in presence of two witnesses.

JOHN J. JONES. lVitnesses L. V. BETIIURUM, ANNA E. MiLLnn.

